//键盘类
public class Keyboard implements USB{
    @Override
    public void OpenDevice() {
        System.out.println("打开键盘");
    }

    public void input(){
        System.out.println("键盘输入");
    }
    @Override
    public void CloseDevice() {
        System.out.println("关闭键盘");
    }
}
